Question

有什么方法可以访问Component外部的身份验证状态？例如我正在尝试，

 public class ServersideCurrentUserIdentityProvider : ICurrentUserIdentityProvider, IDisposable
    {
        private Task<AuthenticationState> currentAuthenticationStateTask;
        private readonly AuthenticationStateProvider stateProvider;

        public ServersideCurrentUserIdentityProvider(AuthenticationStateProvider stateProvider)
        {
            this.stateProvider = stateProvider;
            stateProvider.AuthenticationStateChanged += OnAuthenticationStateChanged;
            currentAuthenticationStateTask = stateProvider.GetAuthenticationStateAsync();
        }

        private void OnAuthenticationStateChanged(Task<AuthenticationState> task)
        {
            this.currentAuthenticationStateTask = task;
        }

        public async Task<ClaimsPrincipal> GetCurrentUserPrincipal()
        {
            var state = await currentAuthenticationStateTask;
            return state.User;
        }

        public void Dispose()
        {
            this.stateProvider.AuthenticationStateChanged -= OnAuthenticationStateChanged;
        }
    }

该课程已在DI中注册

services.AddServerSideBlazor();
services.AddScoped<AuthenticationStateProvider, RevalidatingIdentityAuthenticationStateProvider<ApplicationUser>>();
services.AddSingletone<ICurrentUserIdentityProvider,ServersideCurrentUserIdentityProvider>()

我正在尝试使用CurrentUserProvider作为数据库上下文的参数

public class ExampleDbContext()
{
 public ExampleDbContext(DbContextOption opt, ICurrentUserProvider provider){

  override Task<int> onSaveChange(){
var principal=  await this.userProvider.GetCurrentPrincipal();
foreach .. 
entity.CreatedBy=principal.Name;
}
}

当我尝试运行时，我得到 exception ，说 GetAuthenticationState 应该在 SetAuthentication 状态，我该怎么做???

Answer 1

我个人倾向于设置任何实体负责的实体的“ CreatedBy” /“ DateCreated” / etc属性。

话虽如此，如果仅将AuthenticationStateProvider放入ExampleDbContext构造函数中会怎样？调用它时，它是否会与DbContext一起解析，并允许您找出解析（调用）用户（如果存在的话）？

Blazor AuthenticationStateProvider

1 个答案: